+1 to #2.
I used to argue politics all the time as a poli sci major. In all that time, I never convinced anybody of anything (other than those who already shared my same politics) or changed anybody's mind. So I stopped doing it. I don't read the political threads, even though I'm keenly interested and involved in the topic. It all boils down to the way you view the world and the way your brain (the amygdala, in particular) is wired and even your genetic makeup, it turns out .... and nobody is changing that. (See today's Link Love on the empathy gene .... fascinating stuff.)
"Let food be thy medicine and medicine be thy food." -- Hippocrates